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Turboprops
Aircraft Piper P46T Turboprop conversion (N63PW)
Airline Private
Name Donald M. Jacobson
Date 18 Jan 2008
Groundspeed 430 kts
Notes Between Phillipsburg, PA (PSB) and Hancock, NY (HNK) at flight level 270.

I was flying my Piper P46T (N63PW) a 1987 Malibu JetProp conversion which has a Pratt & Whitney PT6-34 Turboprop Engine.
The attached photo of my Garmin 430 shows the 430 knot ground speed.